Power shovel



March 10, 1925- P. BURKE POWER SHOVEL Filed Jan. 2, 1923 2 Sheets-Sheet l INVEN OR PMe M WI TN 588 ES ATTORNEY Patented Mar. 10, 1925..

I UNITED STATES PATENT OFFICE.

PAUL BURKE, OF GREEN BAY, WISCONSIN, ASSIGNOR TO NORTHWEST ENGINEERING COMPANY, OF GREEN BAY, WISCONSIN, ACORPORATION OF WISCONSIN.

row/ER SHOVEL.

Application filed January 2, 1923.

To all whom it may concern:

Be it known that I, PAUL BURKE. av citi-' zen of the United States. and resident of Green Bay. in the county of Brown, and State of \Visconsin. have invented a certain new and useful Improvement in Power Shovels, of which the following is a specification.

This invention relates to power-shovels. and more particular to that type of shovel in which the. hoisting rope or cable is used to actuate the thrust mechanism.

One of the objects of the invention is to improve and simplify power-shovels of the rope-thrusting type and to provide for the thrusting of the dipper handle without the usual gear mechanism or rack and pinions, or auxiliary driving apparatus of any kind, and to arrange the ropes or'lines for controlling and actuating the dipper so as to avoid the use of drums and to permit the ropes to run substantially true to the plane of the sheaves.

A further object of the invention is to provide a novel construction of guiding mechanism for the dipper handle.

A further object of the invention is to provide a shovel in whieh the multi-part hoisting line for the dipper has a bight in end-thrust engagement with the dipper handle.

The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the con- 0 clusion hereof.

In the drawings: Fig. 1 is a side elevation of a power-shovel embodying the invention; Fig. 2 is a plan view thereoflpartly in section; Fig. 3 is a sectional view through the stick-guiding mechanism.

In the drawings the numeral t designates the boom, which may be of any suitable construction, vertically pivotally attached at its lower end to a rotating base 5 of the .ma chine, said base being of well-known construction. A hoisting drum 6 and an auxiliary drum 7 are mounted on the base 5 in any suitable manner and driven from the prime mover (not shown) on the base. The drums 6 and 7 may be of any well-known construction equipped with clutches and brakes to control their operation. The boom is adapted to be raised or lowered in various positions of vertical adjustment by any well- .mown means, such as a cable 8 connecting Serial No. 610,192.

pulleys 9 at the .outer ends of the boom to parts on the rotating base. The boom shown is of the plate-girder type with the dipper handle or stick it) workfing. between its sides 11. The shipper shaft 12 isfseeured in a casting 13 mounted on the top'of the boomand the saddle-block 14 is loose on said shaft and preferably swings behind said shaft. dipper handle 10 is preferably a single member having a metal covering 15. This handle is mounted to slide between the adjacent saddle-block 14 and a flanged roller and sheave 16. The dipper or shovel 17 carried by the stick may be of any suitable construction.

The roller 16 is provided with a medially disposed guide-groove 18 to form a sheave for the inward thrusting cable 19, said cable passing from the drum 7 over a guide sheave 20, and the sheave 16 along the stick and anchored at its'outer end 21 at the lower end of the stick. The sheave 20 is journalled on a pin 20' secured to the casting 13 in front of the shipper shaft and inclining downwardly and inwardly toward the center line of the boom so that the cable will be properly added from the drum 7 to sheave l6 and Will not interfere with the swingin of the stick.

The dipper handle has a transversely disposed sheave 22 mounted on its upper end and the dipper has a padlock sheave 23 pref erably having its sheave at right angles to the pivot 24.

The hoisting cable 25 passes from the drum 6, over a sheave 27 at the outer end of the boom, then around the padlock sheave 23 over a sheave 28 at the outer end of the boom, thence back over a sheave 29 and over the sheave 22 and a sheave 30, and is anchored or dead-ended on the casting 13 adjacent said sheave 30 as at 30. The sheaves 27 and 28 are preferably revolubly mounted on a common shaft 4 on the boom. The sheave- The i when the drum 7 is prevented from turning by its brake, thereby holding the line or cable 19, and the line is pulled in, the dipper moves-in the arc of a circle of whlch the dipper shaft is the center. If it is desired to crowd further into the bank or move the dipper farther out, as in loading a wagon, the braking effect on the line 19 is released slightly and the line 25 is wound in, whereupon the line 25, working over the upper end of the dipper stick, forces or thrusts the di per stick outward. Conversely, if it is deslred to move the dipper farther in and toward the boom, releasing the brake on line 25 and pulling in on line 19 by the operation of drum 7 produces this effect. Thus, by the proper manipulation and control of the lines 19 and 25 through the rotation or braking ofthe drums 7 and 6, any desired swinging or thrusting movement of the dipper and its handle may be effected. Furthermore, 'by the sheave arrangement above described the thrusting action is substantially as great as the lifting action on the dipper. It will also be noted that the thrusting action on the dipper is propontional to the load upon the dipper and to the resistance and weight of the .material it encounters during digging.

It will be further noted that by swinging the dipper back of the shipper shaft the arrangement of the thrustingcables is facili tated and that the arrangement ofthe guides for said cables prevents their interference with the swinging of the dipper.

I desire it to be understood that this invention is not to be.limited to any specific form or arrangement of parts exce t in so far as such limitations are specific in the claims.

I another portion having a bight in end thrust engagement with the dipper handle for thrusting it outwardly, and se arate means for moving said dipper inwar 1y.

2. In an excavating shovel, the combination of a boom, a dipper handle carried by said boom for swinging andbodily lengthwise shiftin -movements relative thereto, a dipper hoistmg and thrusting cable having a multi-part hoist portlon connecting the dipper and its handle with the boom and another portion having a bight in end thrust engagement with the dipper handle, for crowding the dipper.

' 3. In an excavating shovel, the combination of a boom, of a dipper and dipper handle for. thrusting it outwardly, and a sepa-- rately controlled cable exerting a direct pull on the dipper for moving said dipper inwardl 4. Iii an excavating shovel, the-combination of a supporting boom, a dipper and dipper handle, a shipper shaft on the boom, means including said shaft for mounting said dipper handle on the boom for swinging and shifting movements relative thereto, sheaves on said shaft, a sheave'on the upper end portion of the handle, and a hoisting and thrusting cable between the boom and dipper and passing from one of said sheaves on the shipper shaft'over the sheave on said dipper handle and thence over the other sheave on said shaft and anchored to the boom, said sheaves on said shaft retaining the run of the cable in the same position relative to the handle irrespective of the angular position. of the handle with respect to'the boom, and another cable for moving said dipper inwardly.

5. In an excavating shovel, the combination of a supporting boom, a dipper and dipper handle, means for mounting the said dipper and dipper handle on the boom for swinging and shifting movements relative thereto includin a shipper shaft and a guide behind sald shaft, ahoisting'drum, a sheave on the boom in front of said shipper shaft, a sheave on the shipper shaft, a cable passing from said drum over said sheaves and directly connected to the dipper and dipper handle for moving said dipper inwardly, and a hoisting and outward thrusting cable for the dipper having connection with said boom, dipper and dipper handle.

6. In an excavating shovel, the combination of a supporting boom, a dipper and dipper handle mounted thereon for swinging and bodily lengthwise shifting movements relative thereto, a hoisting drum, a hoisting and thrusting .cable for the dipper extending from said drum over the outer end portion of the boom to support the dipper and operatively connected to said dipper for thrusting directly thereon and on said shaft an guide means for said lastnamedcable including a sheave in front of said dipper handle maintaining the cable run from the drumsubstantially parallel to the boom,

7. In a rope thrusting shovel the combination with the platform and the supporting boom, of a di per and di per handle swinging outward y from sai platform during digging, means for mountin the di per handle on the boom for swinging and s 1ftin movements relative thereto includin a shipper shaft located forwardly and acent the digging. side of the dip r handle.

8. In an excavating shovel te combination of a supporting boom, a dipper and dipper handle mounted thereon for swinging and shifting movements relative thereto, a hoisting and outward thrust cable for the dipper, an operating drum oilsetjrom the axis of the handle, an inward thrusting cable on said drum operatively connected tothe dipper and dipper handle, and a sheave inchned relative to the boom for guiding the inward thrusting cable from said drum to its plane of connection with said handle.

9. In an excavating shovel the combination of a supporting boom, a dipper and dipper handle mounted thereon for swinging and shifting movements relative thereto including a shipper shaft, a hoisting drum, a hoisting and thrusting cable for the dipper,

a sheave on said shipper shaft guide means for said cable including spaced sheaves on the outer end portionofthe boom and a padloch sheave on the dipper transverse to the plane of the sheaves on the boom, said cable extending from said drum substantially parallel to the boom over one of said sheaves thereon around the padlock and over the other sheave to said sheaveon said shaft and thence to a thrusting amociation with the upper end portion of the di per handle, and an inward thrusting cable For the dip er, a drum for said last named cable, sai last named cable" having a run from said last named-drum extending substantially parallel to said boom.

10. In an exdavating shovel, the combination of a supporting boom, a dipper and dipper handle, means for mounting the said dipper anddipper handle on the boom for swinging and shifting movements relative thereto mcludin a s i per shaft, a roller a sad le-block behind said shaft; said roller being provided with a cable groove, a hoistingdrum, a sheave on the boom in front of said shipper shaft, a cable passing from said drum over said sheave on the boom and the groove in said roller for exerting a direct inward pull on the dipper, a second hoisting drum, 8 aced sheaves at the outer end portion of the m, a padlock sheave on the dipper transversely disposed with respect to said last named sheaves, sheaves on said shipper 'shaft,& 9"

. cable or raising dipper han sheave on the upper portion of the dipper handle and a hoisting and thrusting ca le extending from said second drum-over one of said spaced sheaves around the padlock and over the other of said'sp aced sheaves, thence over one of the sheaves on said shiprshaft and over the sheave on said dipper lizndle and over the other sheave on said shipper shaft and anchored to the boom.

11. In an excavating shovel, the combination of a boom, a dipper and dip er handle mounted thereon to swing\ and s ift bodily lengthwise with respect t ereto, sheaves at the outer portion of the boom, a hoistin sheave on the dipper, a dipper-hoisting-an thrusting-cable having a bight in end-thrust engagement with said handle for thrusting it outwardly and running over said sheaves on the boom with. a portion between said sheaves moving on said hoisting sheave.

12. In a ower shovel, the combination of a boom, a ipper and dipper handle, a pivotal support t erefor carried by said boom and permitting swin ing and lengthwise shifting of said han e, a sheave adjacent the outer end of said boom, :1 sheave adjacent said pivotal support, a sheave on said handle, a dipper hoisting cable associated with said sheaves for producing an end thrust on said handle, and means for controlling the lengthwise shifting of said handle.

13. In a power shovel the combination of a boom, a dipper and dipper handle mounted thereon for swinging and lengthwise shifting movements, two, sheaves on said m, a sheave on said handle, a dipper hoisting cable in operative engagement with all of said sheaves to maintain an outward thrust upon said handle, and a second cable assomated with said handle for op osing said thrust to ett'ect and. control lengt wise shifting of said handle.

14. In a device of the character described, the combination with a boom, of a dipper handle carrying a dipper and swingably and slidabl mounted on said boom, an operating and lowering said handle, a sheave on sai boom, beneath which said cable is adapted to pass,and a sheave at the rear end of said handle over which said cable is arranged to pass whereby the cable will exert a thrust in one direction on said handle.

15. In a rope-thrusting shovel, the combination with the sup orting boom, of a d i par and dipper hand e swinging outward y uring dig ng, means for mounting the e on the boom for swinging and bodil lengthwisev shifting movements relative t ereto including a shipper shaft located forwardly of the dip or handle, a hoisting and thrusting "cable for the dipper, and a separately controlled 'backhaul cable, and guide means for said backhaul cable includmg a sheavein front of said shi per shaft.

PAUL URKE. 

